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WebW3b OP t1_iy89npn wrote

Reply to comment by Fellainis_Elbows in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b

I see, so vasoconstriction squeezes the blood cells that was initially unable to reach the heart due to low blood pressure and Thereby increasing preload?

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Fellainis_Elbows t1_iy8elyj wrote

Mostly right. The more technical explanation is that blood is squeezed from the arterial space into the venous space. Veins return blood to the heart -> therefore increased preload

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